an identifier as who we were. we were the choom gang. >> bill clinton, you know, famously said he didn't inhale. obama, on the other hand, not only inhaled b was sort the ringleader of the idea of total absorption, what they call ta, where you had to make sure that everything got inhaled. take roof hits while you're in the car. >> i think it was important to barry because perhaps it did fill a void that wasn't apparent at the time. i don't think any of us thought of it that way, but now in retrospect, we look back and went, hey, we really were a mily this was really, really cool. >> narrator: obama's senior yearbook tells the story. >> in his yearbook he thanks "gramps and toot," who are stan and madeline, his grandparents, and the choom gang, and ray for the good times. who was their drug dealer. who was kind of a hippie who could get them the good stuff. and he doesn't thank his mother. >> narrator: by the time he graduated from punahou, obama had decided to leave hawaii. >> one of the central themes that i find from his life is his intense desire to avoid being trapped. his mother had that.